Forging-machine.



-F. P. BATES.

FORGING'MACHINE.

APPLICATION FILED JULY 28, I913.

1 1. 5 1 35 3 Patented Aug. 31, 1915.

2 SHEETSSHEET l.

awed! cm. uuuu A PLANOGRAPH c0" WASHINGTON, D c.

F. P. BATES.

FORGING MACHINE.

APPLICATION man JULY 28.1913.

1 1 5 ,75 Patented Aug. 31, 1915.

2 SHEETS-SHEET 2.

Ficgi 36 INVENTOR.

Frank/I M PBGTQS.

ATTORNEY.

WITNESSES.-

COLUMBlA PLANOURAPH cm, WASHINGTON, n. c.

UNKTED STATES PATET @FFIQE.

, FRANKLIN P. BATES, OF INDIANAPOLIS, INDIANA.

FORGING-MACHINE.

Application filed July 28, 1913.

To all whom it may concern Be it known that I, FRANKLIN P. BATES, acitizen of the United States, and a resident of Indianapolis, county ofMarion, andv I ings, in which like letters refer to like parts.

The object of this invention is to provide a machine for forming vehiclehubs out of metal tubes. The invention has been made with particularreference to the rapid and economical construction of hubs forautomobiles.

The chief feature of the invention consists in the means for upsetting astraight metal tube so as to form an external spoke flange some distancefrom both ends of the hub, and an internal annular rim or flange whichholds the bearing boX in place. Such internal and'external flanges arerequired in most automobile hubs now in use and means is herein providedfor forming the same from a straight tube and forming the same,preferably, in one operation of the machine, the two flanges beingsimultaneously formed. External spoke flanges have been formed at theend of the hub, but so far as known, there has never been any machineprovided for forming such external spoke flange at a point away from theend of the tube or hub and also for forming said internal flange.Automobile manufacturers require saidflange formed substantially at thepoint herein shown and away from the end of the hub.

In carrying out said invention, a metal tube is cut in proper lengthsand one length of tube is heated and held in place in the machine bysuitable external die members or formers, and one end of the tubecontains and is held by a substantially stationary die member, and aplunger die enters the other end of the tube,said two internal diemembers being formed so as to leave a space for the internal flange ofthe hub while being formed, and a movable die member acts against theend of the tube and upsets it and forms the internal spoke flange somedistance from the end of the tube.

The full nature of the invention will be understood from theaccompanying drawings and the following description and claims.

Specification of Letters Patent.

Patented Au 31, 1915.

Serial No. 781,557.

In the drawings, Figure l is a horizontal section through the machinejust before the movement of the movable die member. Fig. 2 is a portionof what is shown in Fig. l on a larger scale with the parts afteroperation of the movable die member, showing the hub in completed form.Fig. 3 is a section through a portion of an automobile wheel forillustrating the use of said hub. Fig. 4 is a section on a line 44 ofFig. 1. Fig. 5 is a section on the line 55 of Fig. 1. Fig. 6 is asection substantially the same as Fig. 2, but showing a modified form.

The machine is provided with a main frame 10 having a horizontallydisposed shaft 11 with a Wheel 12 which serves both as the drive wheeland fly wheel, although that is immaterial. There is a transverseguideway 13 carrying a sliding block 14 which is operated by the togglelinks 15 and 16, one being pivoted to said block '14 and one to astationary part 16 and the two links being pivoted to the end of a rod17 extending from a strap 18 surrounding a cam 19 secured on shaft 11.Therefore, during each revolution of the shaft 11, the block 14 is movedback and forth. Said block 14 is provided with a semi-circular recess'20 in one side to receive the die member 21 which has a dovetailedflange 22 which operates in a correspondingly formed guideway 23, asindicated in Fig.4. On one side, said die member 21 has a semi-circularrecess 24: to receive the metal tube 25 from which the hub is to beformed. Opposite s'a id die member 2l'there is a corresponding diemember 26 of the same shape and size and mounted in the same manner in afixed portion of'the machine. It has a recess corresponding to therecess '24: so-that said two die members 21 and 26 hold betweenthemsai'dtube 25 and since the die member '26. is relatively fixed, theother die member is moved up clamping the tube 25 between said 'diemembers through the action of the. toggle 15. Each die member 21 and 26is cushioned by a'spring 28, the ends of' which are embedded in said diemembers and the parts in which they are mounted respectively, as shownin Fig. 1. Said springs 28 normally hold the die members '21 a'nd'26outward somewhat.

The movable die member '30 is a plate with a thickened or reinforcedportion 130 through the center of which the plunger die member 31operates. Said movable 'die member 30 is moved toward the die members 21and 26 by connecting rods 32 mounted on cranks 33 on the shaft 11 sothat both connecting rods 32 will be simultaneously operated to forcethe die member 31 toward the die members 21 and 26. The surfaces of thedie members 21 and 26 which are adjacent the die member 30 are flat. Aportion of the surface of the die member 30 adjacent said other diemembers is likewise flat, but it has a relatively deep recess 35immediately surrounding the opening for the plunger 31, said recessbeing of such size as to admit the end of the tube 25. There is anadditional recess 36 and circular in form in the base of said die member30 surrounding said recess 35, but not so deep. Said last mentionedrecess 36 is to form the spoke flange.

The plunger 31 which extends through the die member 30 is actuated by astrap 40 which is connected with the plunger by a rod 41 and whichsurrounds a cam 42 secured 0n the shaft 11 between the cranks 33.

After thetube section 25 has been heated by some proper means, not shownhere, it is picked up by a die member secured to a handle 45. Said diemember referred to consists of an enlarged portion 46 securedimmediately to the handle 45 and of a diameter substantially the same asthe external diameter of the tube 25, and of a reduced portion 47 whichis the same diameter substantially as the internal diameter of the tube25, and a still further reduced portion 48 which has a diameter equal tothe internal diameter of the internal flange 50 of the hub, and thereduced portion 48 of said die member has a length equal to the width ofsaid flange 50. After the tube 25 is picked up by said die member andhandle, it is inserted upon the end of the plunger 31 when in retractedposition, not shown, and at the same time it is put in place in therecess in the die member 26 for said tube and the portion 46 of the diemember on the handle 45 is placed in a recess 52 in the frame of themachine and then the further operation of the machine moves the slidingblock 14 and die member 21 up toward the tube 25 and said block 14 has arecess 51 corresponding to recess 52 for partially surrounding theportion 46 of the die member on the handle 45. In this way the diemember on the handle 45 is held in fixed position and is clampd andlikewise the tube 25, which is to be treated, is clamped securelybetween the die members 21 and 26. After the tube has been thus clampedby the parts referred to, the further rotation of the shaft 11 willcause the plunger 31 to penetrate the tube 25 until it comes against thepart 47 of the die member on the handle 45. Thereafter the parts 47 and48 of the die member on the handle 45 remain momentarily stationary inthe tube so as to maintain the internal form of the tube in its originaldiameter excepting at the flange 50.

In the next placethe further rotation of the shaft 11 will force themovable die member 30 toward the die members 21 and 26 and after drivingthem, in spite of their springs 28, against the solid walls of the block14 and of the frame of the machine, respectively, it will upset the tubeand form a spoke flange 60 by coiiperating with the die members 21 and26. It will also force the middle of the tube into the space around thepart 48 of the die member on the handle 45 and form the internal flange50. Then the parts will be in the position shown in Fig. 2, and the hub25 will be completed.

As shown in Fig. 3, said hub 25 has an in tegral spoke flange 60 andalso a ring 61 which surrounds the hub, and spokes 62 are securedbetween said parts 60 and 61 by bolts 63. The axle 64 extends throughthe hub and is carried by two roller bearings 65 and 66. The rollerbearing 65 is driven into the hub against the flange 50 and the purposeof said flange is to hold said roller bearing 65 in place. The otherroller bearing 66 is threaded into the hub or may be otherwisesupported, and a cap 67 is secured to the outer end of the hub.

In the modified form shown in Fig. 6, the cam 42 is omitted andconsequently the strap 40 and rod 41, and the plunger 31 does not extendentirely through the movable die member 30, but only partiallytherethrough, extending into a hole 70 against a spring 71 embedded insaid hole. The only difference resulting from this modified form is thatthe plunger 31 is not actuated until and excepting by the movable diemember 30 and when it moves up, it carries with it the plunger 31 untilsaid plunger 31 engages the part 48 of the die member on the handle 45.Then said plunger 31 stops, but the movable die member 30 continues tomove and the spring 71 is compressed.

The invention is:

1. A machine for forging articles from metal tubes including a frame,means for externally holding the tube in position in said frame to betreated, means insertible in said tube having a reduced portion, and anex ternal die member movable endwise against the tube for forcing themetal of the tube around a reduced portion of the means within the tubefor forming an internal flange in the tube.

2. A machine for forging articles from metal tubes including a frame,means for externally holding the tube in position in said frame to betreated, two cylindrical die members insertible in the respective endsof said tube until'they abut against each other, one of said die membersbeing in fixed position on the frame and there being a reduced endportion on one of said internal die members, a movable die membersurrounding said internal die member, and means for forcing said latterdie member endWise against the tube for forming an internal flange insaid tube.

3. A machine for forging articles from metal tubes including a frame,means for externally holding the tube in position in said frame to betreated, a die member insertible in one end of said tube and adapted tobe held in fixed position, a plunger adapted to enter the other end ofsaid tube, one of said internal members having a reduced portion on theend thereof, a die member movable endWise against the end of the tubefor forcing the metal thereof around the reduced portion of the memberwithin the tube for forming an internal flange, and means for actuatingsaid plunger first and thereafter said movable die memher.

4. A machine for forging articles from metal tubes including a frame,means for externally holding the tube in position in said frame to betreated, a handle having on the end thereof a die member consisting ofan enlarged portion adapted to be seated fixedly in the frame, a secondportion adapted to be inserted in said tube and of the same diameter asthe internal diameter of the tube, a still further reduced portionWithin the tube, a plunger insertible in the other end of the tube ofthe same diameter as the internal diameter of the tube, an external diemember movable toward and against the end of the tube, and means foroperating first said plunger and then said movable die member.

In Witness whereof, I have hereunto affixed my signature in the presenceof the Witnesses herein named.

FRANKLIN P. BATES.

Witnesses:

O. M. MCLAUGHLIN, J. H. WELLS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

